Locking handle for doors and the like



Dec. 9, 1952 R. H. OSBORNE LOCKING HANDLE FOR DOORS AND THE LIKE Filed July 22. 1950 INVENTOR. fla 1 0.55am W{ far): e36

Patented Dec. 9, 1952 UNITED. STATES PATENT OFFIEE LQGKING HANDLE FOR DOORS Ralph- H. Osborne, Altadena, Califi, assignor to The R. H. osbornehCompany, Altadena, Galif a cornorationnf California ltllGla-ims.

My invention relates generally to locking-type handles for doors and-thelike, and more particu larly to handles of this type adapted to operate a bolt or similar means designed to hold a door closed;

he has o heeh h e a eehihe hehql fer ee d h h'h memb rs f the neral t e d in ee heth r hese deerl be i t e ad ype, h he h hte ly swin ing typese other form. Preferably such a locking handle h e one e' i he eeh. ma he perat by h sam e that o erates he e k oh the d001, e the iee ht ive hhav end e sht helh h e eti f h eek e f h i e ehh le- It is else el r het'the lo h shou d h ru ed and not eas broke or amme hee. eeree e hens enerall s er t ia ehertd s eh efir m a h us a e Often hur la ize w h er 1 e efiert e a of d e tion an the a ef h'e bhre All of thesedesirable qualities indicate thatconde hhlet eh h and ttention must b iven to e. d si n at. h satis a to y andl nd e toe e t ere a e eeh w .1- an leeh he handles ee in all o th se re hhemehte,

Pa i ulenv n the e o v head ee i s desir hl o hav a en ra y .--sh hed handle, ithehe e of the L xt ndin enerally perh ieh er item t e lehe. ef he. dee hile the other leg of the L is spaced from the door andvsenera l para el the eto. Ih th ma er the hand e is adi ras ed an hr ed e e hough he han o the era or ay be dirty or grea y and u thermo e t e and e is o g eat eeh hiehee n l ihe er therwis e eh h the.

ee some at em t have b en made 6 se .--eha l ha dl of ee-eh rel t need for h emeh l 1 e s b h n ral e gn o su h. han les While ver ea i e e or t intende l rheeev ee ot mee he eter m h io e edhirem h s Wh anle i dte g ree dee Am the pr n pal objeetions encountered when using h ehleh le e rhehh s re m u t i dim ul iee eh leeehee 9 the ize f th hea l en its ed lee ihe me hhhiem h hehd e ma het ep rat ol by t e e mehey as that whi h herates th doors o the. dwe in With t ,fere eih hmi d, t i t e e e e ater .ehi et of, m invention t P o ide. an hn ev hleehihs 'h dle. 9rd 1er and h ikehhether obje of m hveht n i t Pr id i ehe hand e hat is eheihandquhklv in talle n s ee o a h ma eize and t pe It is e further b e t ether inven on to preide a l c i handle of. h type h key f which maybe the same key as that which oper ates the locks in the doors of the assoeiated dwelling.

Still another. object of my invention-is to-proe' vide such a lock of simple and rugged construe tion, applicable to doors of anytype, whether overhead doors, hinged doors, or hor izontallyslid ing' doors.

It is a still furtherobieet ofmyinvention to provide a locking handle ofthis type making use of standard looks or tumbler mechanisms, and designed for both inexpensive and largeseale production.

These and other-objectsand' advantagesofmy invention will become apparent-from the 0110??? ing description of a preferred form thereof, and from the drawings illustratingthat; form; inwhich: M

Fig. 1' is a perspective view ofthe rear of a garage door, partially broken away, showing the installation of my improved lockinghandle on an overhead door;

Fig. 2 is a vertical sectional view-taken through the axis of the handle, and'showing theinstalla tion of the handle on a door Fig. 3 is a rear elevational view of the locking handle, showing the positionof the variousmenfbers when the handle islocli'ed;

Fig. 4 is a View similar to Fig, 3, showing-the parts in he uh e k Pee i h ehh' ie- 5' s e View o h eehxe ete teh h ate- 5- ih 2 o in he en tih' meeheh shi 99 5 nected to the e 91' inne h 'e 1 fi h i shaft.

Referring no to e win n PWFZQWQHY o the 1 the o e h m ra i i. hihete generally a door of any suitable type, here indicated as an h ad a e door, a apted P9. 1 9,5 against a header H. The door is providedwith suitable holding means l2, here indicated as the lock shown in my previously filed co pendin'g application, Serial No. 121,365; and ctober 17, 1949, and entitled Lock, though it is to be understood that any other suitable type of door and lock may be used as desired, making appropriate m d fi a o Th eek I? i er, a1- ly resiliently urged to engaging po sition and is operated by a downward pull on some suitable means such as a tape IS, the lock and tapeboth being within the garage, as disclosed inmy pire viously-mentioned co-pending application. At its lower end, the tape I3 is connected to an operating arm I4, and by rotation of the arinfthe tape is pulled downwardly to release the look]? and permit the opening of the door. Theuoperating arm [4 is shown as mounted on a back" plate l5 and engages an operating shaft l6 that extends through the door H) for operation by a locking handle 23.

As more clearly indicated in Figs. 2 to 4, the locking handle 28 includes a housing 2i to which there is pivotally attached a handle member 22 engaging the end of the operating shaft I5 and pivotable about the axis of the latter. The housing 21 is generally oval in shape, with its major axis vertical, though it will be understood that any other appropriate shape may be used, the presently described shape being selected because of its simplicity and its generally pleasing appearance.

Centrally located in the upper portion of the housing 21 is a lock cylinder 23 of the well-known pin-tumbler type. Such cylinders are widely used in all types of locks, and in general the cylinders of various manufactures are interchangeable so that there is no dimculty in mounting the desired cylinder in the housing 2|. Furthermore, the cylinders are conventionally used in the looks of dwellings, and by selecting the proper number of cylinders of the correct type, all of the locks of the dwelling and garage or otheroutbuildings maybe operated by a single key. These cylinders, it will be understood, each have a core 24 that receives the key and may be rotated by the latter, and on the end of the core 24 I mount a cam 25. The core 24 is located below the axis of the cylinder 23, and the cam 25, which rotates about the axis of the core, is thus rotated eccentrically with respect to the axis of the cylinder to operate the holding mechanism in a manner hereinafter described. The cylinder 23 is held in the housing Zl'by a set screw 23, the latter passing vertically through a wall of the housing to engage the lower surface of the cylinder, the head of the screw being covered by the handle 22 when the latter is installed.

As best seen in Fig. 2, the lower end of the housing 2! is stepped or set in to provide a recessed portion for receiving the upper or shaft end of the handle 22. As previously mentioned, the handle is generally L-shaped, having a rather narrow hand-receiving portion extending in a plane generally parallel to the plane of the door [8, and provided at itsupper end with a hollow shaft or boss 33 shaped to receive the shaft It. A pin, screw, or other suitable means (not shown) may be passed through the boss 33 and the shaft 5 to hold the two, and the boss extends through an opening 3| in the housing 2! located below the cylinder 23. The upper end of the handle 22 is spaced a slight distance from the wall separating the stepped portion of the housing from the upper portion containing the cylinder 23, and consequently freedom of movement of the handle is insured, while the set screw 23, holding the cylinder in place, is covered against unauthorized removal. In a similar manner, the handle 22 covers a screw 32 that holds the housing 21 to thevdoor l3, thus preventing the unauthorized removal of the housing; while another screw 33, located at the upper end of the housing, likewise holds the housing to the door in a properly aligned manner, but is accessible at all times. From this it will be seen that it is necessary to remove the handle 22 in order to release the cylinder 23, or to remove the housing 2| from the door. Consequently, so long as the handle 22 is retained in position, it is impossible to remove either the housing or the cylinder without destroying one or both of them.

To prevent the unauthorized removal of the handle 22, the boss 33 attached thereto is provided with a cam-shaped section 34 at its rear end, adjacent the door 13. For the major portion of its length, the boss 33 is cylindrical, but as indicated in Figs. 3 and 4, the cam-shaped portion 34 is provided with a lobe whose crest extends radially outward from the cylindrical surface, while a flattened, generally horizontal surface 35, such as formed by a notch is immediately adjacent the crest. The hole 31 receiving the boss 33 is generally cylindrical, but is provided with an axially extending groove to receive the crest of the cam-shaped portion 34, the groove being intermediate the normal circumferential positions of the cam so that the handle cannot be removed when in either of its two limiting positions. At any time the crest of the cam 34 does not align with the groove of the hole 3 I, the crest will bear against the wall of the housing 2|, thus holding the handle properly aligned with the housing and, as hereinafter explained, preventing the removal of the handle except when the cam 25 of the cylinder 23 is in unlocked position.

Pivotally mounted on the rear of the housing 2! just below the cylinder 23 is a cam-actuated operator 36. The operator 33 is generally T-shaped, and in its locked position, the stem of the T projects vertically downward, while the arms forming the cross bar are subtantially horizontal. At each end of the cross bar, there is a rearwardly extending surface such as that formed by a stud or projection, one stud 3'! controlling the locking of the handle, and the other stud 38 controlling its unlocking. As an alternate construction, the operator 33 may be formed of thicker material, and its upper surface used instead of a separate projection. The operator 36 is pivotally connected to the housing 2| by a screw 43, and the screw is located vertically above the notch 35 in the cam-shaped portion 34 of the bushing 35 when the handle 22 is in its normal or'vertical position. The stem of the T-shaped operator 33 extends vertically downward from the screw 4%] when the operator is in locked position, but may be rotated from this position to the position shown in Fig. 4 when the handle assembly is unlocked. This rotation of the operator 33 is accomplished by the cam 25, as indicated in Figs. 3 and 4, where it will be seen that the cam 25 bears against the locking pin 31 to urge the latter downwardly when the device is in locked position. Rotation of the cam 25 in a clockwise direction, as seen in Figs. 3 and 4. shifts the cam to the opposite side of the housing where it then bears against the unlocking pin 38, urging it downwardly and rotating the operator 33 in a clockwise direction as seen in Figs. 3 and 4.

When the operator 36 is in locked position, the lower end of the stem is aligned with the flattened surface 35 of the cam-shaped portion 34 of the boss 30, and any attempted rotation of the handle 22 in a clockwise direction, as seen in Figs. 3 and 4, causes the generally horizontal surface to be urged upwardly, against the lower end of the stem. However, since this upward force acts along a line passing through the center of the screw 40, the stem of the operator 36 remains stationary and prevents any rotation of the handle 22 in a clockwise direction. Rotation of the handle 22 in a counter-clockwise direction is prevented by the assembly associated with the back plate l5, hereinafter described, and consequently all rotation of the handle is prevented.

When the cam 25 is rotated in a clockwise 5. direction. to .the. position shown in Fig. 4, this be: ing. done by theinsertion of a key and the rotation of the core 24, the cam bears against the.

unlocking stud 38 and moves the operator 33 in a .clockwise direction to the position shown in Fig. 4.. In this unlocked position, the operator 36 hasv been rotated so that the stem portion thereof is swung clear of the surface 35 and the. crest of the cam portion 34 of the boss 38, and consequently the handle 22 is free to be turned in .a clockwise. direction, as shown in Fig. 4. Normally, the. handle 22 must. be rotated .ap proximately 90 to effect the release of the door H1 by. the belt or lock 12, though occasionally a greater .or lesser amount .of rotation is required.

In any event, the groove. of the opening 3| is preferably intermediate the two limiting positionszof the. cam portion .34, so that in either the lockedor unlockedposition, the handle 22 is securely heldi It. will be. appreciated that in the description heretofore given, the terms clockwise and countersclockwise apply to the rotation of the partsgasillustrated in Figs. 3 and 4.. These views, it is. recalled, are taken from the rear of the lock,

and consequently the relative direction of rotation will be reversed when viewing the look from the front .or handle side thereof. While the lock may be constructed to operate in either direction, most people are right-handed, and it is consequently more convenient for one to grasp the handle. 22 with his right hand, and turn it in a counter-clockwise direction, this being the clockwise direction as viewed in Figs. 3 and 4.

The back plate I5 is mounted on the inside or rear of the door It} and has an aperture therein to receive, the shaft l5 and hold it for free rotation. .A collar or other suitable device (not shown) is preferably held to the end of the shaft IE to prevent the unintended withdrawal of the latter from the back plate I5, this forming an additional safeguard against the unauthorized removal of the handle 22 from the housing 2i. Spaced around the opening receiving the shaft it are a plurality of ears 50 that are struck for- I wardly, toward the door Hi, from the plane of the back. plate l5. The ears 5% are generally parallelto the plane of the back plate, but are spaced therefrom so that a thin metal collar 5!, mounted upon the shaft I6, may ride between he. adjacen su a s f th rs and the back plate. The collar 5| preferably has the operating arm l4 formed integrally with it and the collar-isheldto the shaft It for rotation therewith. Generally, the shaft l6 will have a non-circular cross-section such as square, and consequently it is a simple matter to prevent rotation of the colla-r with respect to the shaft. Preferably, the hole in the collar 5! receiving the shaft I6 is formed by cutting the center of the solid collar to form a plurality of triangular ears that are struek forwardly to engage the sides of the shaft and additionally bracev the collar and hold it against rotation with respect to the shaft.

Byproperly locating the ears 5!] formed on the back plate 5|, they will act as limit stops to prevent undesired rotation of the shaft l 5. For example, as shown in Fig. 5, the uppermost ear 5Q bears against the upper side of the operating arm I4 to prevent clockwise rotation of the arm from its upper position, shown in solid outline, corresponding tothe locking position of the lock member l2, and corresponding to the vertical position of the handle 22. Similarly, the lowermost car .50 preventscounter-clockwise rotation counter-clockwise rotation of the shaft 16 as.

shown in Figs. 3 and 4.

To install my improved locking handle, the

housing 2| is mounted upon the outer face .of-

the door It by the screws 32 and 33. I-here-.v after, a hole 53 is bored through the door It in the proper location, the hole being large enough to receive the shaft It, and normally not being greater than one-half inch in diameter. By inserting the drill through the hole 31 of the housing 2!, the proper alignment of the.

hole 53 is insured. The cylinder 23 is examined to make certain that it is in unlocked position, and the handle 22, to which is attached the shaft I6, is then inserted so that the boss 30 extends through the hole 3], the cam.-shaped portion 34 of the boss sliding through thegroove of the hole 3! until entirely within the housing 2|, at which time the handle may be turned to its normal vertical position. Thereafter, the. back plate 15, together with the collar 5| at.- tached thereto, is mounted on the rear surface of the door It), and the operating. arm It is attached to the tape [3 or other operating mechanism of the lock; Finally, the retaining collar (not shown) is attached to the exposed end of the shaft l5, and the device is ready for operation. stallation requires only a single hole, the hole 53, to be drilled through the door, and the driving of two screws 32 and 33. Consequently, all work may be quickly and easily done bythe average carpenter Without the use of .anyspecial tools such as expansion bits, etc. Installation is thus a very simple matter, and requires a minimum of time,

In the operation of the device, the cam 25 is in the position shown in Fig. 3when the lock.- ing handle is in locked position. dition, the locking stud 37 is urged downwardly by the cam 25, causing the stem of the operating member 36 to engage the notch 35 of the cam-shaped portion 3 5. Thus, rotationof the handle 22 in a counter-clockwise direction, as viewed from the exterior of the door, is prevented. At the same time, the upper ear 5b of the backing plate l5 engages the edge of the operating arm It to prevent clockwise rotation of the handle 22, and consequently no operation of the handle is possible. However, when the proper key is inserted in the core 2 3 of the cylinder 23 and turned in a counterclockwise direction, the cam 25 is rotated to the position shown in Fig. 4, the locking stud 3'! is released, and the unlocking stud 38 is engaged by the cam 25 and urged downwardly, pivoting the op erator 36 to the position shown in Fig. 4 where the stem of the operator is moved clear of the cam-shaped portion 34. The cam-shaped portion 34 and the boss 30 to which it is attached are thus free to rotate in a counter-clockwise direction, but are still held against rotation in a direction clockwise from their original positions, by the action of the uppermost car 56 on the backing plate I 5. However, counterclockwise rotation of the handle 22 moves the operating arm M to the position shown in dotted outline in Fig. 5, thereby releasing the lock I2,

It Will be noted that this in. .-v

In this. cone,v

7. and permitting the opening of the door It. In this connection, it will be realized that the horizontal position of the handle 22 is the most convenient for lifting an object such as a garage door, and consequently women and children will have no difficulty in operating a properly counterbalanced door provided with my improved locking handle.

If it is desired to change the cylinder 23, it is only necessary to remove the handle 22 from the housing 2|, and loosen the set screw 26. The cam is then rotated to a position where it extends substantially vertically, and it will be found that the circumferential edge of the cam has been shaped to coincide with the periphery of the cylinder 23 in this position so that the cylinder and cam combination may be easily slipped out of the housing. All standard cylinders of this type are provided with an operating plate on the rear or inward end of the core 24, and the operator 3% is so formed that the operating plate of a standard cylinder acts very satisfactorily as a cam, and consequently no transfer of the cam 25 is necessary. Thereafter, the new cylinder 23 is inserted in the housing 2!, care being taken that the aligning and holding splines and grooves that are used with all such cylinders are properly aligned. The set screw 26 is then tightened, and finally the handle 22 replaced.

It will be appreciated that if the cylinder 23' is not desired, the locking action may be eliminated by providing a plug fitting within the housing 2| in the normal position of the cylinder, and acting to hold the unlocking stud 38 downwardly. However, this feature is usually not desired, except as a temporary expedient.

From the foregoing, it will be seen that I have provided an improved locking handle fully capable of achieving the objects and securing the advantages previously mentioned. However, it will be appreciated that those skilled in the art will be able to make changes in the device that do not depart from the invention herein defined. Consequently, I do not wish to be restricted to the particular form or arrangement of parts herein described and shown, except as covered by my claims.

I claim:

1. A locking handle of the class described which includes: a housing; a handle pivotally attached to said housing; a shaft attached to said handle for movement therewith, said shaft and handle acting as an integral unit having a fiat camshaped portion within said housing; an operating member pivotally connected within said housing and having a flat stem selectively movable from a first position engaging said cam-shaped portion and preventing rotation of said handle and shaft, to a second position clear of said cam-shaped portion so that said handle and shaft may be rotated, said stem and cam portion being substantially perpendicular to a radius through the point of pivotal connection of said operating member in said first portion whereby the force exerted by said cam portion against said stem during attempted rotation of said handle acts only against the pivotal connection and said operating member is held against pivotal movement from said first portion; and locking means mounted in said housing having a cam connected thereto for selectively moving said operating member between said first and second positions.

2. A locking handle of the class described which includes: a housing; a handle pivotally 8 attached to said housing; a shaft attached to said handle for movement therewith, having a generally cylindrical portion that passes through an aperture in said housing with a cam-shaped portion within said housing, said cam-shaped portion including a flattened surface andan adjacent lobe, said lobe extending radially outward beyond said cylindrical portion, and said aperture having an axially extending groove therein circumferentially displaced from the normal position of said lobe for receiving the latter during the insertion and removal of said shaft with said handle attached thereto; an operating member within said housing selectively movable from a first position engaging said camshaped portion and preventing rotation of said handle and shaft, to a second position clear of said cam-shaped portion so that said handle and shaft may be rotated; and locking means mounted in said housing having a cam connected there-.

to for selectively moving said operating member between said first and second positions.

3. A locking handle of the class described which includes: a housing; a handle pivotally attached to said housing; a shaft attached to said handle for movement therewith, said shaft and handle 'acting as an integral unit having a fiat cam-shaped portion within said housing; a pivoted operating member within said housing, rotatable about an axis generally parallel to the axis of rotation of said shaft and handle and having a flat engaging portion adjacent said cam-shaped portion, said operating member being selectively movable from a first position where said engaging portion engages said camshaped portion to prevent the rotation of said handle and shaft, to a second position where said engaging portion is removed from the path of said cam-shaped portion for the free rotation of said handle and shaft, said stem and cam portion being substantially perpendicular to a radius through the point of pivotal connection of said operating member in said'first portion whereby the force exerted by said cam portion against said stem during attempted rotation of said handle acts only against the pivotal connection and said operating member is held against pivotal movement from said first portion; and locking means mounted in said housing having a cam connected thereto for selectively moving said operating member between said first and second positions.

4. A locking handle of the class described which includes: a housing; a handle pivotally attached to said housing; a shaft attached to said handle for movement therewith, said shaft and handle acting as an integral unit having a flat cam-shaped portion within said housing; a pivoted operating member within said housing, rotatable about an axis generally parallel to the axis of rotation of said shaft and handle and having a fiat engaging portion adjacent said cam-shaped portion, said operating member being selectively movable from a first position where said engaging portion engages said camshaped portion to prevent the rotation of said handle and shaft, to a second position where said engaging portion is removed from the path of said cam-shaped portion for the free rotation of said handle and shaft, said stem and cam portion being substantially perpendicular to a radius through the point of pivotal connection of said operating member in said first portion whereby the force exerted by said cam portion against said stem during attempted rotation of said hand1e-acts only against the pivotal connectionand said operating member is held against pivotal movement from saidfirst portion; and locking means mounted in said housing having a portion rotatable with respect to said housing and having a cam connected to said rotatable portion for movement therewith, said cam being rotatable between a first and second position, and engaging said operating member for moving the latter betweenits said first and said second positions, respectively.

5. A locking handle of the class described which includes: a housing; a handle pivotally attached to 'said housing; a shaft attached to said handle for movement therewith, having a generally cylindrical portion that passes through an aperture in said housing with a flat camshaped portion within said housing; a pivoted operating member within said housing, rotatable about an axis generally parallel to the axis of rotation of said handle, and having a flat portion engageable with said cam-shaped portion, said-operating member having locking and unlocking'sections positioned so that pressure on s'aidlocking section rotates said operating memher to move said engageable portion into engagement with said cam-shaped portion, preventing rotation of said cam-shaped portion and said handle, said engageable portion and said camshaped portion being substantially perpendicular to a radius through the point of pivotal con nection of said operating member so that the force exerted by said cam-shaped portion against said engaging portion during attempted rotation of said handle acts along a line passing through the point of pivotal connection of said operating member to said housing, while pressure on said unlocking section rotates said operating member to a position where the engaging portion thereof is removed from the path of said cam-shaped portion, whereby said handle is freed for rotation; and locking means mounted in said housing having a portion rotatable with respect to said housing and having a cam connected to said rotatable portion of said locking means for rotation therewith, said cam being rotatable between a first position where it bears against the locking section of said operating member to move said engaging portion thereof into engagement with said cam-shaped section, and a second position where said cam bears against said unlocking section to move said engaging portion out of the path of said camshaped section.

6. A locking handle of the class described which includes: a housing; a handle pivotally attached to said housing; a shaft attached to said handle for movement therewith, having a generally cylindrical portion that passes through an aperture in said housing with a cam-shaped portion within said housing, said cam-shaped portion including a flattened surface and an adjacent lobe, said lobe extending radially outward beyond said cylindrical portion, and said aperture having an axially extending groove therein circumferentially displaced from the normal position of said lobe for receiving the latter dur" ing the insertion and removal of said shaft with said handle attached thereto; an operating member within said housing for selectively engaging and disengaging said cam-shaped portion, said operating member preventing the rotation of said shaft when engaging said cam-shaped portion; and locking means mounted in said housing for selectively moving said operating means between engaging and disengaging positions.

7. A- locking handle of the class described which includes: a housing; a handle pivotally attached to said'housing; a shaft attached to said handle for movement therewith, having a generally cylindrical'portion that passes through an aperture in said housing with a cam-shaped portion within said housing, said cam-shapedportion including a flattened surface and an adjacent lobe, said lobe extending radially outward beyond'said cylindrical portion, and said aperture having an axially extending groove therein circumferentially displaced from the normal position of said lobe for receiving the latter during the insertion and removal of said shaft with said handle attached thereto; a pivoted operating member within said housing, rotatable about an axis'generally parallelto the axis of rotation of said shaft and handle and having an engaging portion adjacent said cam-shaped portion, said operating member being selectively movable from a first position where said engaging portionengages said cam-shaped portion to prevent the rotation of said handle and shaft, to a "second position where said engaging portion is removed from the path of said cam-shaped portion, for the free rotation of said handle and shaft; and loclringmeans mounted in said housing having, a portion rotatable with respect to said housing and having a cam connected to said rotatable portion for'movement therewith, said cam being rotatable between a first and second position, and engaging said operating member for moving the latter between its said first and said second positions, respectively.

8. A locking handle of the class described which includes: a housing; a handle pivotally attached to said housin a shaft attached to said handle for movement therewith, having a generally cylindrical portion that passes'throu'gh an aperture in said housing with a cam-shaped portion within said housing, said cam-shaped portionincluding a flattened surface'and an adjacent lobe, said lobe extending radially outward beyond said cylindrical portion, and said aperture having an axially extending groove therein circumferentially displaced from the normal position or said lobe for receiving the latter during the insertion and removal of said shaft with said handle attached thereto; a pivoted operating member within said housing, rotatable about an axis generally parallel to the axis of rotation of said handle, and having a portion engageable with said cam-shaped section, said operating member having locking and unlocking sections positioned so that pressure on said locking section rotates said operating member to move said engageable portion into engagement with said cam-shaped section, thereby preventing rotation of said cam-shaped portion and said handle, the force exerted by said cam-shaped portion against said engaging portion during attempted rotation of said handle being along a line passing through the point of pivotal connection of said operating member to said housing, while pressure on said unlocking section rotates said operating member to a position where the engaging portion thereof is removed from the path of said cam-shaped section, whereby said handle is freed for rotation; and locking means mounted in said housing having a portion rotatable with respect to said housing and having a cam connected to said rotatable portion of said locking means for rotation therewith, said cam being rotatable between a first position where it bears against the locking section of said operating member to move said engaging portion thereof into engagement with said cam-shaped section, and a second position where said cam bears against said unlocking section to move said engaging portion out of the path of said cam-shaped section.

9. A locking handle of the class described which includes: a housing adapted to be mounted on the flat surface of a door, and having a recessed portion and a raised portion, each of said portions having an aperture therein; a handle having at least one end thereof in said recessed portion of said housing; a shaft attached to said handle for movement therewith and extending through said aperture in said recessed portion, said shaft being substantially cylindrical adjacent said handle, and said aperture receiving said shaft being substantially cylindrical but with an axially extending groove therein; a cam section on said shaft within said housing, having a flattened surface and an adjacent lobe extending radially outward beyond the periphery of said cylindrical portion of said shaft, said lobe and said groove in said aperture being complemental so that said cam section may b moved axially through said aperture; a generally T-shaped operating member pivotally mounted within said housing, having a downwardly projecting stem portion selectively movable to engage said cam section or to be removed from the path of said cam section, and having a generally horizontal cross-bar section, one end of which is a locking end, and the other end is an unlocking end, said operating member being pivoted for movement about an axis generally parallel to the axis of said shaft, whereby pressure direcmd toward said stem and applied to said locking end urges said stem into engagement with said cam section to hold the latter and said shaft against rotation, While said pressure applied to said unlocking end moves said stem out of said path of said cam section to release the latter and said shaft for limited rotation; a lock cylinder mounted in said aperture in said raised portion of said housing and held against rotation with respect thereto, said cylinder having a key-receiving core rotatable with respect to said cylinder upon the insertion of the proper key within said core; and a cam member attached to said core for movement therewith, said cam member being adjacent said operating member and rotatable between a position where it bears against the locking end of said operating member, and a position where it bears against the unlocking end of said operating member, said cam member thereby effecting the locking and unlocking of said shaft.

10. A locking handle as defined in claim 9 in which said lobe of said cam section is in a first position when said stem engages said flattened surface to hold said shaft against rotation, and said lobe is in a second position, angularly displaced from said first position, when said shaft is rotated to a position effecting the operation of a connected device, and said groove in said aperture is intermediate said first and second position of; said lobe, and further defined by the fact that pressure exerted by said cam section upon the stem of said operating member, upon attempted rotation of said shaft while said stem is in locked position, is in a line passing through said stem and the axis of rotation of said operating member.

RALPH H. OSBORNE.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,309,438 Keefer July 8, 1919 2,442,763 Falk June 8, 1948 FOREIGN PATENTS Number Country Date 331,326 Great Britain July 3, 1930 

